/**
 * Copyright [2019] [LiBo/Alex of copyright liboware@gmail.com ]
 * <p>
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * <p>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p>
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.hyts.generate.mybatisplus.handler.base;

import com.google.common.base.Preconditions;
import com.hyts.generate.mybatisplus.bean.GenerateBean;
import lombok.AllArgsConstructor;

import java.util.Objects;
import java.util.Optional;

/**
 * @project-name:standard-boot
 * @package-name:com.hyts.standard.boot.generator.handler.base
 * @author:LiBo/Alex
 * @create-date:2019-08-02 16:19
 * @copyright:libo-alex4java
 * @email:liboware@gmail.com
 * @description:
 */
@AllArgsConstructor
public abstract class AbstractAttributeValueHandler<P> implements AttributeValueHandler<P,GenerateBean> {

    protected GenerateBean generateBean;

    /**
     * 操作获取默认值服务功能
     * @param value
     * @param defaultValue
     * @return
     */
    public Object getValue(Object value,Object defaultValue){
        Preconditions.checkArgument(Objects.isNull(defaultValue),"默认值不可以为空!");
        return Optional.ofNullable(value).orElse(defaultValue);
    }

}
